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-   -   Fuel pump/filter/line recommendations (http://www.clubcobra.com/forums/all-cobra-talk/121282-fuel-pump-filter-line-recommendations.html)

lippy 07-01-2013 04:46 PM
Fuel pump/filter/line recommendations
 
I'm starting to plan out my fuel delivery system and could use some help. I have a -10 AN pickup in my tank, and a -8 AN hard line going from front to rear. So I will need an electric fuel pump (for a carb'd engine, say 650 HP), regulator, and filters.

Based on the work I've done so far, I will go from the tank to a pre-filter, from the pre-filter to my pump, and from the pump to the hard line at the back of the car. In the engine bay, I will go from the hard line to a post filter, then to a regulator, and then to the fuel log connected to the carb.

My questions are:
- What electric pumps, regulators, and filters have people used for this type of application with good results?
- How did you mount the components at the rear, and in the engine bay? Pix would really be appreciated
- What sort of fuel lines? Brand? Teflon, hard, braided?

Any other tips, articles, etc. would be great too. Thanks!

DAVID GAGNARD 07-01-2013 05:16 PM
Quote:
Originally Posted by lippy (Post 1251198)
I'm starting to plan out my fuel delivery system and could use some help. I have a -10 AN pickup in my tank, and a -8 AN hard line going from front to rear. So I will need an electric fuel pump (for a carb'd engine, say 650 HP), regulator, and filters.

Based on the work I've done so far, I will go from the tank to a pre-filter, from the pre-filter to my pump, and from the pump to the hard line at the back of the car. In the engine bay, I will go from the hard line to a post filter, then to a regulator, and then to the fuel log connected to the carb.

My questions are:
- What electric pumps, regulators, and filters have people used for this type of application with good results?
- How did you mount the components at the rear, and in the engine bay? Pix would really be appreciated
- What sort of fuel lines? Brand? Teflon, hard, braided?

Any other tips, articles, etc. would be great too. Thanks!
I can't help you on the electric pump,I don't use them,on my race car I have an soft 8AN line coming out of the fuel cell,about 24 inches down is a BG log type fuel filter, then soft 8AN line to the Carter mechanical fuel pump on the engine, from the fuel pump it is a 6AN line to the carb.......no problems what-so-ever since 2005.....

This is on a road race car that normally runs from 2500 to 7000 rpms on the track for 30 minutes or more at a time....

David

vector1 07-01-2013 05:26 PM
My tip: toss the electric pump. From the tank to a 100 mic filter, to the mechanical pump, to filter, to carb. Simple.

Bernica 07-01-2013 05:37 PM
1 Attachment(s)
I recently had all the plumbing and tank re-done. Had the Teflon braided stainless before and fought issues all the time.
Used this stuff, which I have been told by some good folks that it is quite resistant to the Ethanol. Did it all the way from tank to carb. I guess only other choice is to go hard-line all the way, but good luck with that.;)

philminotti 07-01-2013 05:46 PM
Hey Bernica-

I was considering switching to TechAFX PTFE hose. What did you find problematic about the PTFE? What did you finally settle on? I'm currently using Earl's braided stainless, but the fuel smell in my garage is not subtle.

Phil

lippy 07-01-2013 08:07 PM
Since my engine will be 650HP +/-, most mechanical pumps won't do. So I thought I'd use an electric. Brent just told me about the RobbMC 1100 HP mechanical pump. RobbMc Performance Products - Ford FE 1100HP Fuel Pump. It's almost as pricey as an electric and requires a regulator, but I guess the plumbing is slightly simpler. Again, I'm torn.

tkb289 07-01-2013 09:26 PM
If Brent can recommend a mechanical pump for your motor, I would give that some thought. Likely it would have simpler plumbing, no extra wiring and when the motor stops running, the fuel stops flowing.

lippy 07-01-2013 09:36 PM
Quote:
Originally Posted by tkb289 (Post 1251221)
If Brent can recommend a mechanical pump for your motor, I would would give that some thought. Likely it would have simpler plumbing, no extra wiring and when the motor stops running, the fuel stops flowing.
All true. The only upside of the electric is filling the carb with fuel after long periods of sitting without cranking the engine.

vector1 07-02-2013 04:30 AM
There is a new post on the FF site, a guy had a fire, and it continued because of the electric pump and efi, fire dept. had to come back and put it out again.........

DanEC 07-02-2013 05:08 AM
I think a good mechanical fuel pump should work fine with the carb. You can also mount an electric fuel pump at the tank to use to prime the engine or even to supplement the mechanical pump. I basically did this with my 66 Corvette with a mostly L88 427 motor in it. At first I used the electric pump all the time as a supplement but after a whiile I realized the mechanical pump didn't need it so I seldom use it now. The mechanical pump doesn't seem to be bothered a bit pulling fuel through the electric pump.

patrickt 07-02-2013 06:00 AM
Quote:
Originally Posted by lippy (Post 1251224)
All true. The only upside of the electric is filling the carb with fuel after long periods of sitting without cranking the engine.
Jeez, Lippy... if that's all your concerned about, a small squirt bottle with gas is all you need. Just squirt a little down the vent tubes and you'll fill the bowls right up. But I'll tell you, I let my car sit for months at a time and, after a few cranks, everything fires right up -- and I'm all mechanical.

Bobcat 07-02-2013 06:42 AM
Lippy , I have , according to the dyno sheet , 612 hp on my 482 and run a bone stock regular Carter mechanical pump and - 8 lines . Have an inline filter coming out of the tank and inline filters built into the fuel inlets that are screwed into the carb ( not the bronze Morain units ) . I do between 200 and 300 miles a year of track time and never had an issue .
A friend of mine has electric pumps on his Porsche Carrera and had a miss that he finally traced to his emergency shutoff system for his pump ..... after three days .
The RobbMc pump is great and I considered one myself , but until I have a problem , won`t change .


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